下面各題能簡算的要用簡便計算1 36

2021-03-17 02:13:10 字數 3627 閱讀 6184

1樓:入戲

(1)1.36+4.85+2.64+6.15,=(1.36+2.64)+(4.85+6.15),=4+11,

=15;

(2)98.5÷2.5÷4,

=98.5÷(2.5×4),

=98.5÷10,

=9.85;

(3)5.4÷[2.5×(3.7-2.9)],=5.4÷[2.5×0.8],

=5.4÷2,

=2.7;

(4)0.8×(4-3.68)÷0.01,=0.8×0.32÷0.01,

=0.256÷0.01,

=25.6;

(5)83.7-12.83-0.17,

=83.7-(12.83+0.17),

=83.7-13,

=70.7;

(6)5.96+13×(3.2-3.12),=5.96+13×0.08,

=5.96+1.04,=7.

下面各題,能用簡便方法計算的用簡便方法計算:2.5×12.5×32 6.4÷2.5÷0.4 5.4×0.36+0.64×5.4 9

2樓:古玉紅

(1)2.5×12.5×32

=(2.5×4)×(12.5×8),

=10×100,

=1000;

(2)6.4÷2.5÷0.4

=6.4÷(2.5×0.4),

=6.4÷1,

=6.4;

(3)5.4×0.36+0.64×5.4

=5.4×(0.36+0.64),

=5.4×1,

=5.4;

(4)9÷0.75+9÷0.25

=12+36,

=48;

(5)17.2-0.71-0.29

=17.2-(0.71+0.29),

=17.2-1,

=16.2;

(6)8.6+1.4÷2.5

=8.6+0.56,

=9.16.

計算下面各題,能簡算的要簡算。3/5÷6÷1/15速度!!

3樓:匿名使用者

3/5÷6÷1/15  

=3/5÷1/15÷6  

=3/5x15÷6

=9÷6

=1.5

50×(3/10+1/5) 

=50×(3/10+2/10) 

=50×1/2

=25

3/8×4/7÷3/8×4/7    

=3/8÷3/8×4/7×4/7

=1×4/7×4/7

=16/49

2/7÷8+5/7×1/8     

=2/7×1/8 +5/7×1/8     

=(2/7+5/7)×1/8     

=1×1/8    

=1/8    

15÷9/25×4/5      

=15×4/5÷9/25

=12x25/9

=100/3   

﹙13-3/10﹚÷3/5

=﹙130-3)/10x5/3

=127/10x5/3

=127/6

下面各題,能簡便計算的要用簡便方法計算.68×35-408÷24     57+98×79+18(0.63-0.63÷3)×0.53.

4樓:手機使用者

(制1)68×

35-408÷24

=2380-17

=2363;

(2)57+9

8×79+1

8=57+(78+1

8)=57

+1=157;

(3)(0.63-0.63÷3)×0.5

=(0.63-0.21)×0.5

=0.42×0.5

=0.21;

(4)3.64×0.25+4.36×0.25=(3.64+4.36)×0.25

=8×0.25

=2;(5)1.3-3.79+9.7-6.21=1.3+9.7-(3.79+6.21)

=11-10

=1;(6)3

22÷[5

4÷(143-1

2)]=322

÷[54

×625]=3

22×103=511.

計算下面各題。(能簡算的要簡算) 1/3×5×2/5÷1/3 1/3×1/15+1

5樓:最美晴天小奕

你敢,很高興為您解答:

1、解:

原式=5×2/5×1/3÷1/3

=5×2/5×1/3×3

=2×1

=22、解:

原式=1/3×(1/15+1/5)

=1/3×4/15

=4/45

3、解:

原式=3.7×6/5+1.3×6/5

=(3.7+1.3)×6/5

=5×6/5

=64、解:

原式=3/4-(6/7-1/4)×17/9=(3/4+1/4-7/16)×17/9

=9/16×17/9

17/16

下面各題能簡算的要用簡便計算.1.36+4.85+2.64+6.15 98.5÷2.5÷4 5.4÷[2.5×(3.7-2.9)]0.8×(4-3.6

6樓:□小千

(1)1.36+4.85+2.64+6.15,=(1.36+2.64)+(4.85+6.15),=4+11,

=15;

(2)98.5÷2.5÷4,

=98.5÷(2.5×4),

=98.5÷10,

=9.85;

(3)5.4÷[2.5×(3.7-2.9)],=5.4÷[2.5×0.8],

=5.4÷2,

=2.7;

(4)0.8×(4-3.68)÷0.01,=0.8×0.32÷0.01,

=0.256÷0.01,

=25.6;

(5)83.7-12.83-0.17,

=83.7-(12.83+0.17),

=83.7-13,

=70.7;

(6)5.96+13×(3.2-3.12),=5.96+13×0.08,

=5.96+1.04,=7.

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